Because, honestly, how many copies of Chrono Trigger is too many copies? Our Supreme Overlords of Capitalism over at Amazon.com are currently discounting a few quality Square Enix titles for the Nintendo DS: Chrono Trigger (originally $19.99) is going for $14.99; The World Ends With You (also $19.99) is now $14.99; Kingdom Hearts: Re:coded (once $34.99) is being offered for $19.99; and Final Fantasy IV (again, $19.99) is being sold for $14.99.
So, you know, pick them up maybe, if you haven't played them already, and know that, with the exception of Kingdom Hearts: Re:coded, they're all still cheaper than the recently released iOS port of Final Fantasy Tactics: War of the Lions. Why don't you understand App Store economics, Square Enix?!